Hemp

'Hemp is one of the most environmentally friendly and versatile natural textile plants on Earth - and one of the first textile plants in history.'
I believe it to be one of the best fabrics within the textile industry although its not widely used. 

• No Pesticides/Herbicides

• Incredibly tough

• Uses very little water

• 'UV protective and anti-bacterial and produces 250% more fibre yield per acre than cotton'

This is a fabric for the future and is something that should be looked into by all clothing retail providers.